In July 2011, Jonathan Harchick of MoldytoasterMedia uploaded a 571-hour long YouTube video recognized as the longest video on YouTube. With less public media coverage Harchick uploaded a longer videos in video December 2011, but now in 2022 both of those previous winners for the longest video on YouTube are hidden from the world.
As of 2022, the longest video on YouTube seems to be this one uploaded by Reazon Zean.